Pipe or tube coupling



'Au .28, 1945. T. R. 55mm 2,383,692 PIPE OR TUBE COUPL\ING Filed March 29, 1943 .INVENTOR. g$77uli Patented Aug. 28, 1945 i V i V I UNITED STATES PATENT OFFICE PIPE on TUBE COUPLING Thomas R. Smith, Newton, Iowa, assignor to The Maytag Company, Newto Iowa, a-corporation of Delaware Application March as, .1943, Serial No. 480,905..

2 Claims. (01. 285-123) The present invention relates to a novel couvided with spaced inwardly opening substanpling for joining adjacent ends of pipe or tube tially v-shaped channels or grooves I!) each sections and for sealing these sections against adapted to receive a substantially wedge-shaped leakage. Among the objects of the invention sealing element ll formed of a resilient mateis to provide a novel tube coupling in which the 5 rial such as natural or compounded synthetic adjoining tube or pipe sections are sealed by rubber or .the like. Excellent results have been a means-of a resilient-ring and retainedninoansecuredby iorming these. substantially l t-Shaped chored position by means of threads or serragrooves in a manner so that the opposed sides tions engaging the outer circumference of the, are disposed at an angle of approximately 60, tube sections when the coupling is assembled. v while the opposed Sides of the Sea in r n s ar Further objects are to provide a construction disposed at an angle of approximately 45. By of maximum simplicity, efficiency, economy and making the angle of the sides of the substanease of assembly and operation. and such furtially wedge-shaped sealing eleme t ess than ther objects, advantages and capabilities as will that of the groove, each sealing element is perlater more fully appear and are inherently mitted to slip or pivot from one side of the groove possessed thereby. to the other about the radius of its vertex, with The invention further resides in the construc the vertex oi each sealing element having a tion, combination and arrangement of parts radius preferably slightly less'than but approxiillustrated in the accompanying drawing, and mately conforming to the radius of the curvature while there is shown'therein a preferred emo the b t om of the o v The Sealing ce 32 bodiment, it is to be understood that the same of the rings H is also curved or rounded in a i suscepti le of modification and change, and manner s s to ma nta substantially t comprehends other details, arrangement of same amount of squeeze or compression upon parts, features and onstructi n t t the surface of its tube section I as this sealing parting from the'spirit of the invention. element slips or pivots within the groove. The

In the drawing: corners of the sealing elements are also rounded Figure 1 is a View in vertical cross section so a to prevent their being pinched or exthrough a tube coupling constructed in accord truded at their sealing edges between the rance with the present invention with but one faces being sealed. of the pipe or tube sections being shown in AS Sh wn n u e the Sealing face 92 h assembled relation and prior to the application 1101; under Compression, xtendspi p jeo sbeof a locking nut. yond the inner diameter 13 of the coupling body Figure 2 is a view in end elevation of the tube 5 so that as each tube section is inserted, proper C p V sealing efiect is obtained between the sealing Figure 3 is a fragmentary view in side elevaring and the surface of the tube section. Nortiim Of One end of the e coupling. mally the tube section is inserted until its. inner Referring more particularly to the disclosure end engages the shoulder it, but due to the in the drawing. the novel coupling assembly sealing effect of the ring i i, these tube sections Comp s s a ub Coupl ng i which is shown in may move or shift longitudinally without afiect- Figure 2 as formed of polygonal shape and with 40 mg the sealing action. its Opp ends I Serrated threaded 011 the From the above description and the disclosure interior 3 and also threaded on the exterior t. in the drawing, it will be apparent that the These ends are also slotted at 5 to 3.110W the end present invention omprehends a novel manner se ments 6 to be flex d r p ssed wn against of joining adjacent tube sections and sealing the tu e sections n thereby anchor or look them against leakage of the fluid being carried. these tube s c n, their proper assembledi Having thus disclosed the invention, I claim:

, P s ti his i a p ed by means of a 1. A coupling for joining the ends of tube or look nut 8 having its interior threaded at 9, and pipe sections, omprising a coupling body prothis threaded portion is tapered inwardly and vided with a centrally disposed internal shouloutwardly so that when the nut is threaded 5o der against which the sections abut and a subonto the external thr a 0f the end Segments stantially v-shaped recess disposed at a sub- 6, the internal serrati n 3 Of h and stantial distance from and to each side of the merits gradually engage and bite into the-outer internal shoulder, projectingends on the cousircumierence of the tube section 7. 4 pling each of which is provided with a threaded The central body of h t e coupling is t e exterior and a serrated interior, an inte ally tapered lock nut threaded onto the exterior of the ends for forcing the serrations on each Drojecting end into the surface of a tube section for locking this section in the coupling, and a sealing ring in each recess for sealing the space between the interior of the coupling and 'atube section.

2. A coupling for joining the ends of tube or pipe sections,- comprising a'coupling body for receiving the ends of the sections to be joined and provided with an internal shoulder against which the ends may engage and a pair of spaced recesses in the body each disposed a substantial distance from each side of the shoulder, serraasaaeoa tions provided in a portion of the coupling-bodythrough which the sections are inserted, means for forcing theseserrations into the tube sections to lock these sections against accidental or unintentional removal, and. a resilient sealing ring carried in each recess and adapted to cir- A cumferentially engage each tube section ior sealing against leakage of the fluid being carried, said recesses and sealing rings being-so disposed that the sealing rings engage and seal against the tube sections even though the ends are spaced a substantial distance from the shoulder.

' moms R. sm'rn. 

